two guys have a gun impounded on their belts. they are both provoked to use them, aim at their victims, and fire. it is all a mishap. both victims are brought to the hospital while both gunners are contrite about what they'd done. one victim survives with a bleeding ear. the other dies.

two students deliberately never study hard enough. near the end of the school year, they are both afraid of getting the axe. they pray hard and create resolutions for the next school year. only one of them pulls through.

two women are drunkdriving. they both have their bestfriends sitting on the passenger's seats. then they crash into an accident. both drivers survive while only one of the passengers does.

two unmarried couples engage in casual sex. the girls later realize that their menstruation is delayed. all four of them get paranoid and incessantly swear to be safe the next time they do it if only it would be a false alarm. one of the girls gets a positive pregnancy test.

different things happen to basically similar people. in any case, loads of regret are expressed and lessons are learned.

this is all a matter of luck. too bad if it turns its back on you.